regular
irregular? The root would be regular, meaning that "ir-" is the prefix to "regular"
Different from the regular/mainstream.
Aduting after regular intervals
how i do curve line
Regular.
A circle is non-polygon. Meaning it has a curved side. A circle has no sides. It is non-regular.
regular, general, usual, normal
what is regular and irregular motion in physics
The word meaning "with constant frequency" is an adjective. The word meaning "a frequent customer" is a noun.
common meaning regularly regular
There is a noun "stipend" meaning an allowance or regular payment.